Mercurial > dropbear

annotate fuzz-common.c @ 1456:a90fdd2d2ed8 fuzz

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
add fuzzer-preauth_nomaths
author Matt Johnston <matt@ucc.asn.au>
date Tue, 23 Jan 2018 23:05:47 +0800
parents f0990c284663
children 32f990cc96b1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1 #include "includes.h"
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
2
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
3 #include "includes.h"
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
4 #include "fuzz.h"
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
5 #include "dbutil.h"
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
6 #include "runopts.h"
1353
f3c8975de38e setup svr_dropbear_exit
Matt Johnston <matt@ucc.asn.au>
parents: 1350
diff changeset
7 #include "crypto_desc.h"
f3c8975de38e setup svr_dropbear_exit
Matt Johnston <matt@ucc.asn.au>
parents: 1350
diff changeset
8 #include "session.h"
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
9 #include "dbrandom.h"
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
10 #include "fuzz-wrapfd.h"
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
11
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
12 struct dropbear_fuzz_options fuzz;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
13
1373
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
14 static void fuzz_dropbear_log(int UNUSED(priority), const char* format, va_list param);
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15 static void load_fixed_hostkeys(void);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
16
1456
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
17 void fuzz_common_setup(void) {
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
18 fuzz.fuzzing = 1;
1357
08f4fa4dc6a0 closer to working
Matt Johnston <matt@ucc.asn.au>
parents: 1356
diff changeset
19 fuzz.wrapfds = 1;
1385
6c92e97553f1 Add a flag whether to longjmp, missed that last commit
Matt Johnston <matt@ucc.asn.au>
parents: 1383
diff changeset
20 fuzz.do_jmp = 1;
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
21 fuzz.input = m_malloc(sizeof(buffer));
1373
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
22 _dropbear_log = fuzz_dropbear_log;
1350
2722f2347a48 crypto_init()
Matt Johnston <matt@ucc.asn.au>
parents: 1348
diff changeset
23 crypto_init();
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
24 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
25
1456
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
26 int fuzz_set_input(const uint8_t *Data, size_t Size) {
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
27
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
28 fuzz.input->data = (unsigned char*)Data;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
29 fuzz.input->size = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
30 fuzz.input->len = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
31 fuzz.input->pos = 0;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
32
1358
6b89eb92f872 glaring wrapfd problems fixed
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
33 memset(&ses, 0x0, sizeof(ses));
6b89eb92f872 glaring wrapfd problems fixed
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
34 memset(&svr_ses, 0x0, sizeof(svr_ses));
1377
d4cc85e6c569 rearrange, all fuzzers now call fuzzer_set_input()
Matt Johnston <matt@ucc.asn.au>
parents: 1373
diff changeset
35 wrapfd_setup();
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
36
1369
ddfcadca3c4c fuzzer-pubkey
Matt Johnston <matt@ucc.asn.au>
parents: 1358
diff changeset
37 fuzz_seed();
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
38
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
39 return DROPBEAR_SUCCESS;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
40 }
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
41
1373
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
42 static void fuzz_dropbear_log(int UNUSED(priority), const char* format, va_list param) {
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
43
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
44 char printbuf[1024];
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
45
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
46 #if DEBUG_TRACE
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
47 if (debug_trace) {
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
48 vsnprintf(printbuf, sizeof(printbuf), format, param);
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
49 fprintf(stderr, "%s\n", printbuf);
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
50 }
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
51 #endif
9891bc31a1b3 fuzzers disable logging by default
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
52 }
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
53
1456
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
54 void fuzz_svr_setup(void) {
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
55 struct passwd *pw;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
56
1456
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
57 fuzz_common_setup();
1353
f3c8975de38e setup svr_dropbear_exit
Matt Johnston <matt@ucc.asn.au>
parents: 1350
diff changeset
58
f3c8975de38e setup svr_dropbear_exit
Matt Johnston <matt@ucc.asn.au>
parents: 1350
diff changeset
59 _dropbear_exit = svr_dropbear_exit;
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
60
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
61 char *argv[] = {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
62 "-E",
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
63 };
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
64
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
65 int argc = sizeof(argv) / sizeof(*argv);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
66 svr_getopts(argc, argv);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
67
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
68 /* user lookups might be slow, cache it */
1386
f0990c284663 fuzzer-preauth don't call getpwnam(), bring back longjmp
Matt Johnston <matt@ucc.asn.au>
parents: 1385
diff changeset
69 fuzz.pw_name = m_strdup("person");
f0990c284663 fuzzer-preauth don't call getpwnam(), bring back longjmp
Matt Johnston <matt@ucc.asn.au>
parents: 1385
diff changeset
70 fuzz.pw_dir = m_strdup("/tmp");
f0990c284663 fuzzer-preauth don't call getpwnam(), bring back longjmp
Matt Johnston <matt@ucc.asn.au>
parents: 1385
diff changeset
71 fuzz.pw_shell = m_strdup("/bin/zsh");
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
72 fuzz.pw_passwd = m_strdup("!!zzznope");
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
73
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
74 load_fixed_hostkeys();
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
75 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
76
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
77 static void load_fixed_hostkeys(void) {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
78 #include "fuzz-hostkeys.c"
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
79
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
80 buffer *b = buf_new(3000);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
81 enum signkey_type type;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
82
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
83 TRACE(("load fixed hostkeys"))
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
84
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
85 svr_opts.hostkey = new_sign_key();
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
86
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
87 buf_setlen(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
88 buf_putbytes(b, keyr, keyr_len);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
89 buf_setpos(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
90 type = DROPBEAR_SIGNKEY_RSA;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
91 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
92 dropbear_exit("failed fixed rsa hostkey");
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
93 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
94
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
95 buf_setlen(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
96 buf_putbytes(b, keyd, keyd_len);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
97 buf_setpos(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
98 type = DROPBEAR_SIGNKEY_DSS;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
99 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
100 dropbear_exit("failed fixed dss hostkey");
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
102
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
103 buf_setlen(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
104 buf_putbytes(b, keye, keye_len);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
105 buf_setpos(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
106 type = DROPBEAR_SIGNKEY_ECDSA_NISTP256;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
107 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
108 dropbear_exit("failed fixed ecdsa hostkey");
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
109 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
110
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
111 buf_free(b);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
112 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
113
1357
08f4fa4dc6a0 closer to working
Matt Johnston <matt@ucc.asn.au>
parents: 1356
diff changeset
114 void fuzz_kex_fakealgos(void) {
08f4fa4dc6a0 closer to working
Matt Johnston <matt@ucc.asn.au>
parents: 1356
diff changeset
115 ses.newkeys->recv.crypt_mode = &dropbear_mode_none;
08f4fa4dc6a0 closer to working
Matt Johnston <matt@ucc.asn.au>
parents: 1356
diff changeset
116 }
1383
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
117
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
118 void fuzz_get_socket_address(int UNUSED(fd), char **local_host, char **local_port,
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
119 char **remote_host, char **remote_port, int UNUSED(host_lookup)) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
120 if (local_host) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
121 *local_host = m_strdup("fuzzlocalhost");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
122 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
123 if (local_port) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
124 *local_port = m_strdup("1234");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
125 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
126 if (remote_host) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
127 *remote_host = m_strdup("fuzzremotehost");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
128 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
129 if (remote_port) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
130 *remote_port = m_strdup("9876");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
131 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1377
diff changeset
132 }
1456
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
133
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
134 /* cut down version of svr_send_msg_kexdh_reply() that skips slow maths. Still populates structures */
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
135 void fuzz_fake_send_kexdh_reply(void) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
136 assert(!ses.dh_K);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
137 m_mp_alloc_init_multi(&ses.dh_K, NULL);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
138 mp_set_int(ses.dh_K, 12345678);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
139 finish_kexhashbuf();
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
140 assert(!ses.dh_K);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
141 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
142
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
143 int fuzz_run_preauth(const uint8_t *Data, size_t Size, int skip_kexmaths) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
144 static int once = 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
145 if (!once) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
146 fuzz_svr_setup();
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
147 fuzz.skip_kexmaths = skip_kexmaths;
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
148 once = 1;
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
149 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
150
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
151 if (fuzz_set_input(Data, Size) == DROPBEAR_FAILURE) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
152 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
153 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
154
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
155 // get prefix. input format is
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
156 // string prefix
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
157 // uint32 wrapfd seed
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
158 // ... to be extended later
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
159 // [bytes] ssh input stream
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
160
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
161 // be careful to avoid triggering buffer.c assertions
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
162 if (fuzz.input->len < 8) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
163 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
164 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
165 size_t prefix_size = buf_getint(fuzz.input);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
166 if (prefix_size != 4) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
167 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
168 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
169 uint32_t wrapseed = buf_getint(fuzz.input);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
170 wrapfd_setseed(wrapseed);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
171
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
172 int fakesock = 20;
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
173 wrapfd_add(fakesock, fuzz.input, PLAIN);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
174
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
175 m_malloc_set_epoch(1);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
176 if (setjmp(fuzz.jmp) == 0) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
177 svr_session(fakesock, fakesock);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
178 m_malloc_free_epoch(1, 0);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
179 } else {
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
180 m_malloc_free_epoch(1, 1);
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
181 TRACE(("dropbear_exit longjmped"))
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
182 // dropbear_exit jumped here
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
183 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
184
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
185 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents: 1386
diff changeset
186 }